Boiler-furnace



Patented Sept. 69 H2L 7SHEETSSHEET l.

A. SPYER.

BOILER FURNACE.

APPLICATION FILED DEC.22,1'J20.

LSQBQQ@ fHU A. SPYER.

BOILER FURNACE.

APPLICATION FILEII DEC,22. 1920.

LSSQ., Patentedept. 6, H2L,

INVENTO W/W/ /M/ BY ATTORNEYS A. SPYER.

BOILER FURNACE.

APPLICATION FILED DEC. 22, 1920.

LBQQQ., Patentedept. 6, WZL

YSHEETS-SHEET 3.

HNVENTOR ATTORNEYS A. SPYER.

BOILER FURNACE.

APPLICATION FILED 050.22.1920.

LSQQQ Patentedpt. 69 1921..

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NTO W2/ www ATTORNEYS A. SPYER.

BOILER FURNACE.

APPLICATION FILED DEc.22,.192o.

LSQUMQQ, Patentedsept. 69 19211 SHEETS-SHEET 6.

E. glf- I I I INVENTOR. /TJ

A TTORNEYS.

TEUR SJPYJER, F LONDON, ENGLAND, ASSIGNOR T0 THE BABCOCK & WILCX C@ PANY, 0F BAYONNE, NEW JERSEY, A CORIBORATION 0F NEW J r:

1 LEY.

4 BOILER-JEURNACJE.

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Specication of Letters Patent.

rarement sept. e. iai.

Application led December 22, 1920. Serial No. 432,590.

To all whom t may concern Be' it known that l, ARTHUR SPYER, a subject of the Kingof Great Britain, residing at 14 Clarendon Court, Maida Vale, London, England, have invented certain new and use- 'ful Improvements in Boiler-Furnaces, (for which I have led application in England, Nov. 8, 1919, and Feb. 2A, 1920, Germany, Oct., 1920, and Spain, Oct. 19, 1920,) of which the following is a specification.

My invention relates to improvements in and connected with boiler furnaces arranged for coal and oil firing and has for its object to provide an improved construction and arrangement 'of such furnaces whereby they can be converted from coal firing to oil tiring and vice versa, without the necessity for any re-construction of the furnaces, and the furnace can also be employed with coal and oil tiring simultaneously.

A feature of the invention consists in this, that the ducts or boxes for the supply of .air form an integral part of the boiler supporting structure and are in position for use under all conditions of firing, and can be arranged at either end. A further feature consists in this, that the air for coal firing and burners, as the case may be, is suitably controlled or deflected by means of impeller vanes or plates with the object of securing a uniform diusion of air in the ash pits or around the burner.

A further feature of my invention relates tothe regulator in which the impeller plates or vanes are attached to the inner side of the stationary member of the air ldistributer nearer the furnace.

Other objects of my invention will appear the speciication and will be particularly 'pointed out in the claims.

My invention is illustrated in the accompanying drawings, in which Figure l is an elevation of a portion of the front of a boiler furnace applied to a water tube boiler arranged in accordance with my invention;

Fig. 2 is a longitudinal section on the line A-B of Fig. 1; Fig. 3 is a longitudinal section on the line C-D of Fig. 1; Fi 4 is a sectional plan taken on the line L of Fig. 2 through the air cones through which air is supplied for the oil burners; Fi 5 is a sectional elevation taken on the line F of Fig. 6; Fig. 6 is a sectional plan through firing only; Fig. 10 is a vertical section ofl the impeller plate and damper; Fig. 11 is a front view looking on the damper plate, andshowing the ports full open for passage of air; Fig. 12 is a front v1ew of the impeller plate with the damper removed; Fig. 13 is a plan view showing the vanes or deflectors on the back of the impeller plate; Fig. 14 is a vertical longitudinal 'section through the air mixers of a boiler furnace for oil firing and providedwith a modified form of air mixer or distributer; Fig. 15 is a sectional elevation on the line G-H 'of Fig. 111, looking in the direction of the arrows; Fig. 16 is a sectional plan view of the air mixer illustrated in Fig. 14; Fig. 17 is a vertical longitudinal section through the air mixer of a furnace fitted for oil firing and provided with an air distributing arrangement 'similar to that illustrated in connection with the coal firing in Fig. 2; Fig. 18 is a sectional end elevation taken on the line K-L in Fig. 17, and looking in the direct-ion of the arrows; Fig. 19 is a detail viewI taken on the line M-N of Fig. 18, and Fig. 20 is a sectional elevation brick Located on a level with the ash pit and arranged on either side of the ash-pit openings X and beneath the oil burners are plates H fitted with a movable damper H operated from the outside by a handle I for the control of the air supplied beneath the grate. Impeller plates I-I2 on the plate H deflect the air as it enters, in lieu of allowing it to flow in streams, and serve to distribute uniformly the air entering through the plates H. The air box or air duct K, for the supply of air, is preferably formed integral with the boiler supporting structure.` Within the air box or duct are provided dampers L adapted to control the supply of air to the oil burners E, While the damper H controls the supply of air to the a-sh pits. AA common duct thus serves both burners. rI`he wing air cones may be inclined to the furnace wall, as indicated in Figs. 4, 5 and 6.

To convert the boiler from coal firing to oil firing, it is merely necessary to cover the grate bars with fire-bricks M, as indicated in dotted lines in Fig. 2, to o en the damper L, and to close the damper by means of the handle I, and if desired to protect the liredoorsI G by means of brickwork. In convertingwfrom oil firing to coal firing, the reis removed, the burner opening closed, for exampleJ by means of a closing brick N, secured in place by means of a bolt O extending to the boiler front, the damper I.- closed and the damper H opened.

In employing simultaneously coal and oil firing, the grate bars would be left as for coal firing, the oil burners left as for oil firing, and the air for both regulated by the damper L, and damper H to suit the quan'- tity and quality of each fuel to be burnt.

In such circumstances, the bed of coal would form the protection for the grate bars.

In the construction shown in Fig. 7 ,the

air box or duct K, the'impeller plate H and the oil burners E are located at one end of the boi1er,vthe fire door G being shown as located at the opposite end, though it might also be arranged at the same end of the boiler. As shown in Figs. 8 and 9, I may, in lieu of covering the grate bars with fire-brick, as shown in Fig. l, remove the grate bars and by providing a lining P of brickwork, convert the Whole of the space into a combustion chamber. Thefre-doors .G may be protected also by a brickwork wall P' as previously described. Such an arrangement is particularly suitable when oil firing is to be continued over a considerable period of time.` A l In the embodiment of my invention illustrated in Figs. 14 to 16, K denotes the air duct for supplying air-under pressure to the boiler furnace, E' indicates the oil burner and F an air mixer, the mixer shown be ing in the form of a truncated cone. With- Y 1in the air duct K is rotatably mounted a cylinder R arranged to fit over a cylinder S fixed within the air duct coaxially with thev oil burner. The movable cylinders R and the fixed cylinder S are each provided with' openings T and U, respectively, on their peripheral walls, so that on turning the movable cylinder by means of the hand- Wheel V, the air may be shut off by bringing the openings T in the one cylinder opposite the metal ofthe other. As illustrated in Fig. 15, to one'. edge of each opening in one of the cylinders (cylinder S in the illustration) are attached deflecting vanes W in such manner as to cause uniform diffusion of the air inside the cylinder.

In the construction shown in Figs. 17 and 18, in which K2 indicates the air duct, E2

`A'the burner, and F2 the air mixer, the air distributer is shown as composed of a flat disk H3 disposed adjacent the inner side of the air duct and mounted for rotation with a spindle X operable by a handle I', said disk H3 having openings H4 so spaced that the solid metal between them is sufficient to cover completely corresponding openings H5 in a fixed plate Z, which separates the air duct from the air chamber containing the burners, the disk H3 and the plate Z being arranged to fit against one another. The air is admitted from the air duct to the chamber containing the burners by uncovering the opening H5 by rotating the circular disk H3. To the fixed plate Z on one edge of each of the openings H5 are fixed deflectin f vanes H6. In lieu of arrangment for controlling the supply of air to .the burner consists of a solid plate H7, ar-

ranged to be moved by means of a handle I2 toward and from a fixed perforated plate H8 with deflecting vanes to control the quantity of air fiowing to the burner. A rotatable plate H9, such as shown in Fig. 17, is provided for controlling the supply of air to the ash pit, but, of course, this plate could be made solid and arranged to move axially along the spindle supporting it by means of alrod or rods projecting through the front p ate.

I claim:

1.- A boiler furnace adapted to burn either liquld or solid fuel, having a single front, said front having therein a solid fuel firing "icc antennae opening, an ash pit opening beneath said iring opening, an oil burner at one side of said firing opening and above the furnace grate with an air supply opening adjacent the burner, a solid fuel air supply opening below the grate and beneath the air supply openingl for the oil burner, a vertical duct extending from the boiler room floor upward outside the furnace front and at one side of said ash pit opening 'and said firing opening and covering both air supply openings, and dampers in said duct, whereby air Vfrom the duct may be supplied to both said air supply openings or to either one alone. 2. A boiler furnace adapted to burn either liquid or solid fuel, having a single front,

said front having therein a solid fuel firing opening, an oil burner at one side of said firing opening and above the furnace grate with an air su ply opening adjacent the burner, a solid uel air supply opening below the gra-te and beneath the air supply opening for the oil burner, a vertical duct extending from the boiler room Hoor upward outside the furnace front and at one side ofy said firing opening and covering both air supply openings, and dampers in said duct,

whereby air from the duct may be supplied anv oil burner at each side of said iring` opening and above the furnace grate, and a solid fuel air supply opening beneath each air supply opening for the oil burners 'and below the grate, a plurality of vertical ducts outside the furnace parts and each covering one of the solid fuel air supply openings and the oil burner air supply opening above it and located at one side of the solid fuel firing opening, and dampers in each duct, whereby air from the duct may be supplied to both the air openings with which it connects or to either one alone.

ARTHUR SfPYER. Witnesses: Y

HENRY PELHAM SMITH, JOHN HARPER MCKINLAY. 

